The *original* Zerg rush(es) that everyone complained about in the early days could be either a 1-hatchery hydra rush (before larva spawn rates were nerfed in 1.03 or .04 or whatever it was) and the 6-pool Zergling rush. So this is fine.

Besides, the term "Zerg rush" has largely become corrupted in general non-Starcraft-specific discussion to mean "attacking with a large swarm", rather than the original meaning of a very quick attack. Eg, the use of the term in WoW.